Study On The Influence Of Ground Undulation On Differential Settlement Of High Fill Airport In Mountainous Area

With high speed development,the Midwest area airport construction in our country in the southwest has a large number of high fill the airport.High fill road surface subsidence deformation is too large or uneven settlement and other diseases have occurred,which seriously affect the normal use of the airport and the safety of the aircraft land and take off,so it is necessary for high fill settlement deformation law at the airport and its influencing factors of systematic and comprehensive study.About the influence factors of embankment settlement,is currently the focus of the discussion is mainly focused on the filling height,Tu RongChong filling and foundation soil and overlying load,etc.And in the uneven settlement of airport pavement damage of actual engineering survey found in the same geological and fill structure,fill body of different terrain conditions,the uneven settlement of destruction is also different.Therefore,to study the effect of terrain conditions on the differential settlement mechanism is necessary,in order to be considered in the practical engineering and take corresponding measures.Based on the integration of the southwestern part of the high fill airport,on the basis of survey data,summarizes the typical terrain of exists in the southwest area,the terrain slopes in valleys.Take it as the research object,carries on the numerical simulation test and geotechnical centrifugal experiment research,and combined with a high fill grooves terrain airport measured values as an engineering example to further clarify the high fill embankment body under the relief surface subsidence characteristics.Main work contents and achievements of this paper are as follows:(1)Of the high fill in southwest airport topography is introduced in detail,points out the universality of terrain problem in engineering construction in southwest China,and summarizes the typical terrain as the research object.(2)Using FLAC3 D to typical terrain modeling analysis,and to establish a comparison model,the influence of high fill embankment subsidence terrain parameters,through the analysis of experimental results in the subsidence regularity under the influence of the terrain.(3)In numerical simulation experiments conducted on the basis of the conclusion of geotechnical centrifuge experimental design,and eventually was studied by geotechnical centrifuge experiments under different shape of foundation settlement of high fill embankment of airport body of the rule of change and differential settlement amount.(4)The empirical formula of terrain parameters is put forward,and compared with the research achievements of predecessors,and to explore its feasibility,and put forward to avoid the terrain effects on differential settlement amount is too large the necessary engineering measures.